Cracked chimney crown letting water into the flue
Why it happens here
Raintree crowns were poured thin and without a proper drip edge. Water sits on top, freezes, and splits the crown. Once cracked, every rain sends water down the outside of the flue and into the attic or ceiling.
Our approach
We rebuild the crown with chimney crown mix, add an overhang and drip edge, and seal it. We also check the top course of brick, because a bad crown usually damages that too. Most crown rebuilds here are done in two to four hours.